﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WinformTest
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            var sql = "select * from Articles";
            var dt = DbHelper.GetDataTable(sql);

            dataGridView1.DataSource = dt;

            dataGridView1.ReadOnly = true;
            dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            dataGridView1.AllowUserToAddRows = false;

            dataGridView1.Columns["Id"].HeaderText = "编号";
            dataGridView1.Columns["Title"].HeaderText = "文章标题";
            dataGridView1.Columns["Author"].HeaderText = "文章作者";
            dataGridView1.Columns["CreatedTime"].HeaderText = "创建时间";
        }


        //查找
        private void button1_Click(object sender, EventArgs e)
        {
            var title = textBox1.Text;
            var sql = string.Format("select * from Articles where Title like '%{0}%'", title);

            var dt = DbHelper.GetDataTable(sql);

            dataGridView1.DataSource = dt;
        }

        //添加
        private void button2_Click(object sender, EventArgs e)
        {
            Editform editform = new Editform();
            var res = editform.ShowDialog();

            if (res == DialogResult.Yes)
            {
                var title = textBox1.Text;
                var sqlArt = string.Format("select * from Articles where Title like '%{0}%'", title);
                var dt = DbHelper.GetDataTable(sqlArt);

                dataGridView1.DataSource = dt;
            }
            else
            {
                MessageBox.Show("退出添加");
            }
        }

        //更新
        private void button3_Click(object sender, EventArgs e)
        {
            if (dataGridView1.SelectedRows.Count > 0)
            {
                var id = (int)dataGridView1.SelectedRows[0].Cells["Id"].Value;
                var title = (string)dataGridView1.SelectedRows[0].Cells["Title"].Value;
                var author = (string)dataGridView1.SelectedRows[0].Cells["Author"].Value;

                Editform editform = new Editform(id, title, author);
                var res = editform.ShowDialog();

                if (res == DialogResult.Yes)
                {
                    var titleTemp = textBox1.Text;
                    var sqlArt = string.Format("select * from Articles where Title like '%{0}%'", titleTemp);
                    var dt = DbHelper.GetDataTable(sqlArt);

                    dataGridView1.DataSource = dt;
                }
                else
                {
                    MessageBox.Show("退出更新");
                }
            }
            else
            {
                MessageBox.Show("您还没有选择任何的行！", "提示");
            }
        }

        //删除
        private void button4_Click(object sender, EventArgs e)
        {
            if (dataGridView1.SelectedRows.Count > 0)
            {
                var row = dataGridView1.SelectedRows[0];

                var id = (int)row.Cells["Id"].Value;

                var res = MessageBox.Show("确定删除吗？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information);

                if (res.Equals(DialogResult.Yes))
                {
                    var sql = string.Format("delete from Articles where Id={0}", id);
                    var rowCount = DbHelper.AddOrEditOrDeleteSave(sql);
                    if (rowCount > 0)
                    {
                        var title = textBox1.Text;
                        var sqlArt = string.Format("select * from Articles where Title like '%{0}%'", title);
                        var dt = DbHelper.GetDataTable(sqlArt);

                        dataGridView1.DataSource = dt;

                        MessageBox.Show("删除成功", "提示");
                    }
                }
            }
            else
            {
                MessageBox.Show("您还没有选择任何的行！", "提示");
            }
        }
    }
}
